Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos esportes da pac-12 são mostrados para a Universidade Estadual Politécnica da Califórnia?
 ###Tabelas: CREATE TABLE 2009_draft_picks (2009_draft_picks_id AUTO_INCREMENT PRIMARY KEY, Round INT, Player VARCHAR, Position VARCHAR, Nationality VARCHAR, College/junior/club team (league) VARCHAR) CREATE TABLE introduction_of_address_classes (introduction_of_address_classes_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Leading bits INT, Size of network number bit field VARCHAR, Size of rest bit field VARCHAR, Number of networks VARCHAR, Addresses per network VARCHAR, Start address VARCHAR, End address VARCHAR) CREATE TABLE affiliate_members (affiliate_members_id AUTO_INCREMENT PRIMARY KEY, Institution VARCHAR, Location VARCHAR, Founded INT, Type VARCHAR, Enrollment INT, Nickname VARCHAR, Current Conference VARCHAR, Pac-12 Sports VARCHAR) CREATE TABLE demand (demand_id AUTO_INCREMENT PRIMARY KEY, Entities VARCHAR, Country VARCHAR, Supply point VARCHAR, Voltage (kV) INT, Power (MW) INT) CREATE TABLE michigan_counties_by_per_capita_income (michigan_counties_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT)  
SELECT COUNT Pac-12 Sports FROM affiliate_members WHERE Institution = California Polytechnic State University